Wow, it's been awhile since I've checked here
If people are still curious, I do not use wrath with heart of the wild. I have a 509 caster weapon and a 517 gao-rei. I find that I do roughly the same damage during hotw wrath spam as I do in cat normally, and if I pause my cat rotation to HoTW, I let my bugged rip fall. If I wrath spam at the start, I won't be able to apply a rip with my potions and all other procs up. Wrath spam just doesn't seem to be worth it too much for me, although I actually haven't done the numbers. I know that I spike to ~180k dps during the intial hero/banner/stormlash with beserk and only ~150k with wrath, but then I have berserk after ... it's a tough call. I just take the path of least resistance and cat it up, only using hotw for a tranq or for aoe - especially fun on Sha of Fear when he has 8 dread spawns running around him.
Regarding Tsulong - HoTW is the clear winner this fight. I am usually able to heal 20-25 million hp on Tsulong himself per pull. Considering that pure dps players are doing ~35-40 mil damage total, and that healing Tsulong in the day phase is essentially equal to dpsing him during the night, doing 60% more effective damage beats the snot out of DoC's piddly 3% damage increase.
Regarding bearform abilities - I can totally see how bear thrash, as a 3 gcd ability, is worthwhile to cast as cat on paper. Having said that though, you run into the issue that it's like a 1% dps increase in optimal circumstances and if you use it wrong at all, you end up losing a lot more than you stand to gain.